EVENT 1: Formation of the UNIVERSE

EVENT 2: Formation of the EARTH Air composition Early atm EVENT 2: Formation of the EARTH

EVENT 3: Mixture of elements Complex molecules “Mud formation” EVENT 3: Mixture of elements

EVENT 4: Formation of small units CO2 — Carbon dioxide CO — Carbon monoxide H2O — Water N2 — Nitrogen CH4 — Methane NH3 — Ammonia EVENT 4: Formation of small units

EVENT 5:Formation of Macromolecules Oparin-Haldane Miller-Urey Experiments EVENT 5:Formation of Macromolecules

Proteins Polysaccharides Nucleotides Lipids and Fats CELL-like structures composed of these Macromolecules EVENT 6:Macromolecules to Pre-CELLS

EVENT 7: Formation of Pre-CELLS

EVENT 8: Pre-CELLS to Living CELLS RNA ? EVENT 8: Pre-CELLS to Living CELLS

5 Descriptions of FIRST LIFE Unicellular Asexually reproducing Aquatic environment RNA containing heterotrophic